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spec_of_value.go
81 lines (76 loc) · 1.3 KB
/
spec_of_value.go
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package gocode
import (
"bytes"
"go/ast"
)
type ValueSpec struct {
Spec *ast.ValueSpec
}
func NewValueSpec(spec *ast.ValueSpec) *ValueSpec {
return &ValueSpec{
Spec: spec,
}
}
func (v *ValueSpec) IsExport() bool {
for _, name := range v.Spec.Names {
if IsExport(name.Name) {
return true
}
}
return false
}
func (v *ValueSpec) Output(all bool) (s string, e error) {
if !all && !v.IsExport() {
return
}
var w bytes.Buffer
spec := v.Spec
for i, name := range spec.Names {
if i != 0 {
_, e = w.WriteString(`, `)
if e != nil {
return
}
}
if all || IsExport(name.Name) {
_, e = w.WriteString(name.Name)
} else {
_, e = w.WriteString(`_`)
}
if e != nil {
return
}
}
if spec.Type != nil {
_, e = w.WriteString(` ` + NewTypeExpr(spec.Type).TypeString())
// _, e = w.WriteString(` ` + spec.Type.(*ast.Ident).Name)
if e != nil {
return
}
}
// == 0 時通常是由 iota 指定
if len(spec.Values) != 0 {
_, e = w.WriteString(" = ")
if e != nil {
return
}
for i, expr := range spec.Values {
if i != 0 {
_, e = w.WriteString(`, `)
if e != nil {
return
}
}
_, e = w.WriteString(NewValueExpr(expr).String())
if e != nil {
return
}
}
}
_, e = w.WriteString("\n")
if e != nil {
return
}
s = w.String()
return
}